fix: log env opts and collapse duplicate blocks

src/agents/pi-embedded-helpers.sanitizeuserfacingtext.test.ts

@@ -27,4 +27,14 @@ describe("sanitizeUserFacingText", () => {
     const raw = '{"type":"error","error":{"message":"Something exploded","type":"server_error"}}';
     expect(sanitizeUserFacingText(raw)).toBe("LLM error server_error: Something exploded");
   });
+
+  it("collapses consecutive duplicate paragraphs", () => {
+    const text = "Hello there!\n\nHello there!";
+    expect(sanitizeUserFacingText(text)).toBe("Hello there!");
+  });
+
+  it("does not collapse distinct paragraphs", () => {
+    const text = "Hello there!\n\nDifferent line.";
+    expect(sanitizeUserFacingText(text)).toBe(text);
+  });
 });